Standard library header <condition_variable> (C++11)

 

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Standard library headers

Language support
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <stdfloat> (C++23) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11) <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
Concepts
<concepts> (C++20)
Diagnostics
<stdexcept> <stacktrace> (C++23)	<cassert>	<cerrno>	<system_error> (C++11)
Memory management
<memory>	<memory_resource> (C++17)	<scoped_allocator> (C++11)
Metaprogramming
<type_traits> (C++11)	<ratio> (C++11)
General utilities
<utility> <tuple> (C++11) <optional> (C++17) <variant> (C++17)	<any> (C++17) <expected> (C++23) <bitset>	<functional> <typeindex> (C++11) <execution> (C++17)	<charconv> (C++17) <format> (C++20) <bit> (C++20)
Strings
<string_view> (C++17) <string>	<cctype> <cwctype>	<cstring> <cwchar>	<cuchar> (C++11)
Containers
<array> (C++11) <deque> <forward_list> (C++11) <list>	<vector> <map> <set> <unordered_map> (C++11)	<unordered_set> (C++11) <queue> <stack> <flat_map> (C++23)	<flat_set> (C++23) <span> (C++20) <mdspan> (C++23)
Iterators
<iterator>
Ranges
<ranges> (C++20)	<generator> (C++23)
Algorithms
<algorithm>	<numeric>
Numerics
<cfenv> (C++11) <complex>	<random> (C++11) <valarray>	<cmath>	<numbers> (C++20)
Time
<chrono> (C++11)	<ctime>
Localization
<locale>	<clocale>	<codecvt> (C++11/17*)
Input/output
<iosfwd> <iostream> <ios> <streambuf>	<istream> <ostream> <iomanip> <print> (C++23)	<sstream> <spanstream> (C++23) <fstream> <syncstream> (C++20)	<filesystem> (C++17) <cstdio> <cinttypes> (C++11) <strstream> (C++98*)
Regular expressions
<regex> (C++11)
Concurrency support
<stop_token> (C++20) <thread> (C++11) <atomic> (C++11)	<stdatomic.h> (C++23) <mutex> (C++11) <shared_mutex> (C++14)	<condition_variable> (C++11)   <semaphore> (C++20) <latch> (C++20)	<barrier> (C++20) <future> (C++11)
C compatibility
<cstdbool> (C++11/17/20*)   <ccomplex> (C++11/17/20*)	<ctgmath> (C++11/17/20*)	<cstdalign> (C++11/17/20*)	<ciso646> (until C++20)

 

This header is part of the thread support library.

Classes
condition_variable (C++11)	provides a condition variable associated with a std::unique_lock (class)
condition_variable_any (C++11)	provides a condition variable associated with any lock type (class)
cv_status (C++11)	lists the possible results of timed waits on condition variables (enum)
Functions
notify_all_at_thread_exit (C++11)	schedules a call to notify_all to be invoked when this thread is completely finished (function)

Synopsis

namespace std {
  class condition_variable;
  class condition_variable_any;
 
  void notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
 
  enum class cv_status { no_timeout, timeout };
}

Class std::condition_variable

namespace std {
  class condition_variable {
  public:
    condition_variable();
    ~condition_variable();
 
    condition_variable(const condition_variable&) = delete;
    condition_variable& operator=(const condition_variable&) = delete;
 
    void notify_one() noexcept;
    void notify_all() noexcept;
    void wait(unique_lock<mutex>& lock);
    template<class Pred>
      void wait(unique_lock<mutex>& lock, Pred pred);
    template<class Clock, class Duration>
      cv_status wait_until(unique_lock<mutex>& lock,
                           const chrono::time_point<Clock, Duration>& abs_time);
    template<class Clock, class Duration, class Pred>
      bool wait_until(unique_lock<mutex>& lock,
                      const chrono::time_point<Clock, Duration>& abs_time, Pred pred);
    template<class Rep, class Period>
      cv_status wait_for(unique_lock<mutex>& lock,
                         const chrono::duration<Rep, Period>& rel_time);
    template<class Rep, class Period, class Pred>
      bool wait_for(unique_lock<mutex>& lock,
                    const chrono::duration<Rep, Period>& rel_time, Pred pred);
 
    using native_handle_type = /* implementation-defined */;
    native_handle_type native_handle();
  };
}

Class std::condition_variable_any

namespace std {
  class condition_variable_any {
  public:
    condition_variable_any();
    ~condition_variable_any();
 
    condition_variable_any(const condition_variable_any&) = delete;
    condition_variable_any& operator=(const condition_variable_any&) = delete;
 
    void notify_one() noexcept;
    void notify_all() noexcept;
 
    // noninterruptible waits
    template<class Lock>
      void wait(Lock& lock);
    template<class Lock, class Pred>
      void wait(Lock& lock, Pred pred);
 
    template<class Lock, class Clock, class Duration>
      cv_status wait_until(Lock& lock,
                           const chrono::time_point<Clock, Duration>& abs_time);
    template<class Lock, class Clock, class Duration, class Pred>
      bool wait_until(Lock& lock, const chrono::time_point<Clock, Duration>& abs_time,
                      Pred pred);
    template<class Lock, class Rep, class Period>
      cv_status wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time);
    template<class Lock, class Rep, class Period, class Pred>
      bool wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time, Pred pred);
 
    // interruptible waits
    template<class Lock, class Pred>
      bool wait(Lock& lock, stop_token stoken, Pred pred);
    template<class Lock, class Clock, class Duration, class Pred>
      bool wait_until(Lock& lock, stop_token stoken,
                      const chrono::time_point<Clock, Duration>& abs_time, Pred pred);
    template<class Lock, class Rep, class Period, class Pred>
      bool wait_for(Lock& lock, stop_token stoken,
                    const chrono::duration<Rep, Period>& rel_time, Pred pred);
  };
}